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A synthetical geoengineering approach to evaluate the largest hydraulic fracturing-induced earthquake in the east shale basin, Alberta

引用

Petroleum Science 2023年第1期20卷 460-473页

作者： Gang Hui Zhang-Xin Chen Zheng-Dong Lei Zhao-Jie Song Lin-Yang Zhang Xin-Ran Yu Fei Gu State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249PR China Department of Chemical and Petroleum Engineering University of CalgaryCalgaryABT2N1N4Canada Research Institute of Petroleum Exploration and Development Beijing10083PR China School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao257000ShandongPR China College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China

On 2019-03-04,the largest induced earthquake(ML4.18)occurred in the east shale basin,Alberta,and the underlying physical mechanisms have not been fully *** paper proposes a synthetical geoengineering methodology to comprehensively characterize this earthquake caused by hydraulic *** on 3D structural,petrophysical,and geomechanical models,an unconventional fracture model is constructed by considering the stress shadow between adjacent hydraulic fractures and the interactions between hydraulic and natural *** poroelastic simulations are conducted to reveal the triggering mechanisms of induced *** is found that four vertical basement-rooted faults were identified via focal mechanisms *** brittleness index(BI)along two horizontal wells has a high magnitude(BI>0.5),indicating the potential susceptibility of rock *** to the presence of overpressure,pre-existing faults in the Duvernay Formation are highly susceptible to fault *** occurrence of the earthquake clusters has been attributed to the fracturing fluid injection during the west 38^(th)-39^(th) stage and east 38^(th) stage *** brittleness,formation overpressure,and large fracturing job size account for the nucleation of earthquake clusters,and unconventional natural-hydraulic fracture networks provide fluid flow pathways to cause fault *** workflow can be used to mitigate potential seismic risks in unconventional reservoirs in other fields.

关键词： Geoengineering Hydraulic fracturing Induced seismicity Fault reactivation Mitigation strategies east shale basin

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